Year	% (national estimate)
1980	68.18985426926076
1983	68.39329333501716
1984	68.95357891162807
1985	69.01416550776993
1986	68.28011028964501
1987	68.41959809908856
1988	69.20670954529908
1989	69.67017842304317
1990	69.7270516834216
1991	70.1089705832643
1992	69.4364385337188
1993	68.77872040784278
1994	68.50679830589647
1995	67.95425036827667
1996	67.99274605336052
1997	68.09236539445628
1998	67.94038222775762
1999	67.76160077254372
2000	67.7260986262949
2001	67.61024208413116
2002	66.67949103943171
2003	66.32271875503591
2004	66.21613669748363
2005	66.5262660510241
2006	66.72955533692785
2007	67.05566634711688
2008	66.70410760383487
2009	64.44334493987051
2010	64.15625821058528
2011	64.36624901682282
2012	64.37406021296006
2013	64.21564988578483
2014	64.48848102495948
2015	64.80135638977444
2016	65.16160438499591
2017	65.5713171476033
2018	65.92190957914002
2019	65.88153055614862
2020	63.22939902123638
2021	64.42332176206506
2022	65.62234464146275
2023	65.51080339511128